Diagnostic Trouble Code (DTC) Information ECM-244C
Condition
The engine control module (ECM) controls preheating by pulsing the current to the positive temperature coefficient (PTC) element in the front heated oxygen sensor (HO2S). Pulse lengths are dependent on the temperature of the heated oxygen sensor (H02S).
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the signal is higher than a certain value when preheating is active.
Substitute Value
- Heated oxygen sensor (HO2S) control is disabled.
Possible Source
- Short-circuit to supply voltage in the signal cable
- Damaged front heated oxygen sensor (HO2S).
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.